JPH0140748Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating mechanism for a height device in a vehicle seat.

Conventionally, this type of mechanism, for example, Japanese Patent Application Laid-open No. 56-124522,
The operating mechanism of the height device disclosed in Japanese Patent Application Laid-open No. 57-307030 and others is that a coiled lock spring installed inside the drum expands its outer diameter due to its spring force and presses against the inner periphery of the drum. Frictional force acts to lock the seat, and by rotating the operating lever, the outer diameter of the lock spring is reduced and the locking state is released.Furthermore, by rotating the operating lever in the vertical direction, the seat can be raised or lowered. It has a structure that allows

Therefore, the angle difference between the operating levers when changing from the locked state to the unlocked state is required to be approximately 7 degrees, and this play causes vertical play in the seat, causing discomfort to the occupant. In addition, the stopper torque force was only 6 to 7 kg, which caused problems with poor operability.

The present invention was developed in view of the above circumstances, and its purpose is to enable the height of the seat to be adjusted by raising and lowering the seat with a small amount of operating force, and to improve the operability of unlocking. It's about making things better.

To achieve the above object, the present invention has an operating lever that is slidable in a cylindrical body provided on a bracket and that raises and lowers the seat by rotating the knob in the vertical direction with the knob exposed to the outside. , a stopper for locking the seat at a predetermined height, the operating lever has a long guide hole in the length direction, the center of the stopper is rotatably attached to the bracket, and A locking portion that engages with the engaging member is provided on the distal end, and a pin that is inserted into the guide hole is provided on the distal end, and the guide hole of the operating lever is provided on the knob side so that the locking portion engages with the engaging member. a lock portion that guides the pin in an engaged state; a lock release portion that is provided on the base end side of the operating lever and guides the pin in a disengaged state with respect to an engaged state of a locking portion; The lock is comprised of a switching part that communicates with a release part, and is characterized in that the lock is released by pulling the operating lever out of the cylindrical body, and the seat is raised and lowered by rotating in the vertical direction.

Therefore, by pulling out the operating lever from the cylindrical body, the operating lever becomes longer, and the seat can be adjusted up and down with less operating force than the conventional product.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, reference numeral 1 indicates an operating lever having a guide hole 1 for raising and lowering the seat by vertically rotating a knob 11, and reference numeral 2 indicates a stopper for locking the seat at a predetermined height.

As shown in FIG. 1, the operating lever 1 is slidably mounted in a cylindrical body 31 in the longitudinal direction so that the knob 11 is exposed to the outside. The cylindrical body 31 is provided on the outer surface of the bracket 3, and the stopper 2 is rotatably attached to the inner surface of the bracket 3 at its longitudinal center with a pin 22. 41 are fixed together, and an engagement member 4 made of a gear is pivotally attached to this shaft 41.

A locking portion 20 that meshes and engages with the engaging member 4 is provided on the distal end side of the stopper 2,
Further, a pin 21 is fixed to the tip side of the stopper 2.

The pin 21 is provided to protrude into the cylindrical body 31 from an arcuate long hole 32 provided on the inner surface of the bracket 3 at a position facing into the cylindrical body 31.

The pin 21 of this stopper 2 is inserted into the guide hole 10 of the operating lever 1 inserted into the cylindrical body 31, and prevents the operating lever 1 from escaping from the cylindrical body 31.

As shown in FIG. 2, the guide hole 10 of the operating lever 1 has a lock portion 10a provided on the knob portion 11 side, and
A lock release part 10b provided on the opposite side of the base end of the operating lever 1, and a step-shaped switching part 10 that communicates the lock part 10a and the lock release part 10b.
The lock portion 10a is a long hole that is long in the pull-out direction (lengthwise direction) of the operating lever 1, and the lock portion 10a corresponds to the position of the pin 21 (height In addition, the lock release part 10b is set to the position (height) of the pin 21 when the stopper 2 rotates and the locking part 20 is disengaged from the engaged state 20 (disengaged state).
The switching portion 10c is provided with an inclined step so as to communicate the locking portion 10a and the unlocking portion 10b. Therefore, the locking portion 20 of the stopper 2
If it engages with the engaging member 20 at the position shown in the figure, the pin 21 provided at the tip of the stopper 2
is at a high position in the engaged state and at a low position in the disengaged state, so the locking part of the guide hole 10 of the operating lever 1 is located at a high position in the disengaged state.
The hole is opened horizontally at a higher position than 0b.

FIGS. 3 and 4 show a locked state in which the seat height is maintained constant, and the locking portion 20 of the stopper 2 is engaged with the engaging member 4 by the urging force of the spring. In this state, the pin 21 of the stopper 2 is engaged with the lock portion 10a in the elongated hole 10 of the operating lever 1.

FIG. 5 shows a state in which the locked state is released. When the knob 11 of the operating lever 1 is squeezed and the operating lever 1 is pulled out from the inside of the cylinder 31, the pin 2 of the stopper 2
moves from the locking part 10a of the elongated hole 10 through the switching part 10c to the unlocking part 10b, so both parts 1
The step difference stoppers 2 of 0a and 10b rotate in the direction of the arrow, and the locked state is released. In this state, when the operating lever 1 is rotated in the vertical direction, the seat is raised and lowered, and the height of the seat is adjusted.

As described above, this invention releases the locked state by pulling out the operating lever, so it has good operability in releasing the lock, and can also prevent the seat from shaking in the vertical direction when the lock is released, as in the conventional product. . Furthermore, since the length of the operating lever increases as it is pulled out, even women and girls can adjust the seat height with a small amount of operating force.

[Brief explanation of drawings]

Figure 1 is a perspective view showing how the proposed product is used;
3 is an exploded perspective view, FIG. 3 is a side view showing the locked state, FIG. 4 is a longitudinal sectional view of FIG. 3, and FIG. 5 is a side view of the unlocked state. In the figure, 1 indicates an operating lever, and 2 indicates a stopper.

Claims (1)

[Scope of utility model registration request] an operating lever that is slidable in a cylindrical body provided on the bracket and that raises and lowers the seat by rotating the knob in the vertical direction with the knob exposed to the outside;
The operating lever has a long guide hole in the longitudinal direction, the center of the stopper is rotatably attached to the bracket, and the end of the stopper is rotatably attached to the bracket. A locking portion that engages with the engagement member is provided on the side, and a pin that is inserted into the guide hole is provided on the tip side, and the guide hole of the operating lever is provided on the knob side so that the locking portion engages with the engagement member. a lock part that guides the pin in the engaged state; a lock release part provided on the proximal end side of the operating lever to guide the pin in the disengaged state with respect to the engagement member of the locking part; and the lock part and the lock part. A height device comprising a step-shaped switching part that communicates with a release part, and is characterized in that the lock is released by pulling out the operating lever from the cylindrical body, and the seat is raised and lowered by rotating in the vertical direction.